If the bumps on the ear cavity are red, swollen and painful, it is considered to be a boil, which is caused by the local skin being damaged by pulling out the ear too hard and the inflammation of the follicular pores by bacterial infection. If the bumps growing in the ear cavity are soft and there are no symptoms of redness, swelling or pain, consider them to be sebaceous cysts, formed due to excessive excretion of glandular proliferation secretions blocking the pores, which are ineffective with medication, and suggest surgical removal at the hospital. It can also be caused by otitis externa, swollen lymph nodes, allergies, etc. As long as the cause is found and treated properly, it can subside. Pay attention to ear hygiene, don’t pull out your ears with your hands, don’t wear headphones, eat less spicy food, and keep the skin around the ear hole clean to prevent the situation.